The Clapper is one of those weird devices that is fun to use even if it's a sure sign of absolute laziness. To counter the laziness, you can build one yourself. Hacker and blogger Alan did it on the cheap using an ATtiny and a few other parts.

It might seem like a tough task on first glance, but considering Alan has included all the codes and schematics you'll need, it's a pretty easy process. The end result is a homemade Clapper that you can plug into nearly any device and start clapping to turn it on and off. Hopefully the DIY aspect will help negate the laziness you might feel every time you clap on a light. Find the full schematics, parts list, and code over on Alan's blog.